Field of invention
[0001] This disclosure relates to a water boiler and in particular to the type of water
boiler that is installed under a counter and provides an instantaneous heating of
water through activation of a heating element within the boiler.
Background art
[0002] Water boilers and water heaters are well known to provide hot water. It is known
to provide point of use water boilers to provide a source of hot water at a sink and
known boilers include those that include a heating element and that is located under
the sink or counter where the hot water is required. Such water boilers typically
comprise a receptacle or water container into which cold water is introduced. The
container comprises a heating element which when activated heats the water prior to
it being dispensed through an outlet located over the counter.
[0003] In a manner similar to kettles or other point of use water boilers, such known boilers
suffer from lime-scale formation on the inner surface of the water container, in particular
on the heating element, which generally impairs the water quality and reduces the
performance of the water boiler. Although such water boiler may have filter to stop
the lime scale, it is important for the user of the water boiler to regularly clean
the container. The cleaning is however a fastidious process.
[0004] DE 19 547 705 A1 discloses a water boiler according to the preamble of claim 1 and describes in a
water heater or water boiler a heating element in direct contact with essentially
planar surface of a flanged plate of a water container. In order that the flanged
plate carrying the heating element contributes to the improvement of the convection
of the heated water, the surface carrying the heating element runs at a right angle
to the horizontal. A higher zone and deeper zone are formed by the flanged plate.
DE 100 06 553A1 discloses a domestic hot water storage having a storage tank provided with a heating
element. The storage tank is provided with an insulation, a cold water inlet in the
lowest region of the container and a water outlet at an upper region thereof. To make
a simple construction, the bottom of the storage tank is formed with or connected
to an electric heating plate. The outer surface(s) and the bottom of the container
are provided with a casing serving as insulation.
[0005] There therefore continues to exist a need for improved water boilers.
Summary of the Invention
[0006] These and other needs are achieved by a water boiler in accordance with the present
teaching. Such a boiler comprises a water container having side walls defining a sealed
volume within which water may be received and heated, at least one of the side walls
being removable to provide access to the volume, wherein the removable side wall is
configured to receive and locate a heating element such that removal of the removable
side wall effects a corresponding removal of the heating element, the heating element
being a planar heating element extending substantially perpendicular to a major axis
of the water container. In a preferred implementation the removable side wall defines
the bottom surface of the container. Desirably the bottom surface is configured to
receive and locate a heating element such that removal of the bottom surface effects
a corresponding removal of the heating element. The heating element is desirably a
planar heating element extending substantially parallel to a major axis of the removable
side wall.
[0007] Advantageously, with a water boiler according to the present invention, once the
removable side wall is removed, easy access to the volume of the water container is
provided, with the removal providing concurrent direct access to the heating element
seated on the removable side wall of the water container, thereby greatly facilitating
the cleaning of lime-scale deposited on the inner surface of the water container and
the heating element. Part or all of the heating element may have a surface treatment
to delay the onset of lime deposits and generally reduce lime scale deposits build
up.
[0008] In a further development of the invention, the heating element extends up to at least
one side wall of the water container.
[0009] In the invention, the removable side wall comprises a spray valve for introducing
water in the water container.
[0010] In a further development of the invention, the water container further comprises
at least one insert portion of side walls arranged to be inserted between the removable
side wall and a lateral side wall of the water container.
[0011] In addition, the water boiler according to the invention advantageously requires
low energy input thereby allowing for domestic plug.
[0012] According to a second aspect of the present invention there is provided an under-counter
water storage comprising a water boiler according to the present invention.
[0013] In a further development of the invention, the under-counter water storage comprises
a faucet for dispensing heated water from the water container and arranged to control
water introduction in the water container
Brief description of drawings
[0014] A specific implementation of the present invention will now be described, by way
of example only, and with reference to the accompanying drawings in which:
Figure 1 is a cross-sectional perspective view of a water boiler according to an implementation
of the present invention;
Figure 2 is a partial perspective view of the water boiler of figure 1;
Figure 3 is an enlarged view of a lower portion of the water boiler of figure 1;
Figure 4 is a cross-sectional perspective view of an upper portion of the water boiler
of figure 1;
Figure 5 is an enlarged cross-sectional perspective view of an upper portion of the
water boiler of figure 1;
Figure 6 is an enlarged cross-sectional perspective view of a connection of the first
and second portions of the water container of the water boiler of figure 1.
Figure 7 is a schematic view of an under-counter water storage comprising a water
boiler according to the present invention.
Detailed description of preferred embodiment of the invention
[0015] Referring to figure 1 a water boiler 1 is provided comprising a water container 2
having side walls defining a sealed volume V, defined by an inner surface of the side
walls, within which water may be received and heated, at least one of the side walls
3 being removable to provide access to the volume V. Preferably, as shown in Figure
1, the removable side wall 3 defines a bottom surface 3a of the water container 2
and the side walls of the water container 2 comprise at least one lateral side wall
4 and an upper side wall 5. As will be described in more detail below, the removable
side wall 3 is removably attached to an end 4a of the lateral side wall 4 opposite
the upper side wall. The water container 2 has a container major axis and the lateral
side walls 4 extend along the container major axis. The removable side wall 3 has
a major axis A that extends substantially perpendicular to the container major axis
of the water container 2.
[0016] Preferably, while the removable side wall 3 of the water container 2 is removable
from the lateral side wall 4, the lateral side wall 4 and the upper side wall 5 may
be rigidly assembled in a bell-like structure. Advantageously, the water container
2 is tightly sealed when the removable side wall 3 is attached to the lateral side
wall 4.
[0017] It will be appreciated that, any descriptive or orientation terms used herein, such
as "upper", "lower", "bottom", etc. are to be understood as being descriptive of relative
positions of various components of the water boiler 1. In particular, the water boiler
1 has an operating position, shown in Figure 1, in which the water container 2 is
orientated with the bottom surface 3a lower than the upper side wall 5. In the operating
position of water boiler 1 shown in Figure 1, the container major axis of the water
container 2 and the lateral side walls 4 are substantially vertical, the major axis
A of the removable side wall 3 is substantially horizontal. Accordingly, any descriptive
or orientation terms used herein, such as "upper", "lower", "bottom", etc. refer to
the water boiler 1 in the operating position. However it is understood that the water
container 2 may have a different orientation, for example where the bottom surface
3a is located above or at a similar level as the upper side wall 5, for example during
a delivery or installation of the water boiler 1.
[0018] Water coming from an inlet pipe 6a may be introduced in the water container 2 by
a valve 6 and as heated water generally rises in the water container, heated water
may be drawn from a top output port 8 and flow through an outlet pipe 8a. Preferably
the valve 6 is located in a lower portion of the water container 2, preferably disposed
on the removable side wall 3. In an aspect, the top output port 8 may be plug in conventional
pipe connections, for example ¼ inch pipe connections, to connect a conventional water
circuit.
[0019] In the embodiment shown in Figure 1, the water container 2 has a lateral side wall
4 substantially forming a cylinder and having a generally circular cross-section.
However, it is understood that the water container 2 may generally have any cross-sectional
shape and a plurality of side walls, for example a rectangular or square cross section
respectively forming a cuboid or cubic water container.
[0020] Preferably, the end 4a of the lateral side wall 4 of the water container 2 has a
diameter, or generally a cross sectional size, that is sensibly the same as a maximal
diameter, or cross sectional size, of the lateral side wall 4 of the water container
2, so as to provide an easy access to the volume V when the removal side wall 3 is
removed. In another aspect, the water container 2 may have a tapered longitudinal
shape or any cross-sectional shape arrange to allow an easy access to the volume V
when the removable side wall 3 is removed.
[0021] According to the invention, the removable side wall 3 is configured to receive and
locate a heating element 9 such that removal of the removable side wall 3 effects
a corresponding removal of the heating element 9. Hence, advantageously, the removal
of the removable side wall 3 provides a direct access to the heating element 9, for
cleaning or maintenance purposes for example, in addition to the direct access to
the volume V of the water container 2. In an aspect of the invention, the heating
element 9 is a planar heating element extending substantially parallel to the major
axis A of the removable side wall 3. The planar heating element 9 is therefore extending
substantially perpendicular to the container major axis of the water container 2.
In the operating position of water boiler 1 shown in Figure 1, the heating element
9 is substantially horizontal.
[0022] Preferably the heating element 9 extends at least on an inner surface 7 of the removable
side wall 3 peripherally defined by the lateral side wall 4. Preferably the heating
element 9 extends up to the lateral side wall 4 of the water container 2. As will
be described in more detail with reference with Figure 3, the heating element 9 may
extends laterally beyond the inner surface 7 of the removable side wall 3. The heating
element 9 may be connected to the removable side wall 3 so as to cover the surface
of the removable side wall 3 to obtain an even temperature on the heating element
9, for example by crimping, preferably brazing or welding.
[0023] The heater element 9 may be made of copper or stainless steel. Advantageously part
or all of the heating element 9 may have a surface treatment arranged to delay the
onset of lime deposits and/or reduce lime scale deposits build up in the water container
2, for example a resistive coating. The water container 2 is preferably made, at least
on the inner surface thereof, of a material on which the deposit of lime scale is
low, preferably plastic material. The valve 6 is located on the planar heating element
9 so as to bring the incoming water on the heating element 9. Advantageously the valve
6 is a spray valve arranged to spray incoming water on the heating element 9 to achieve
a rapid heating of the water and avoid mixing the incoming, preferably cold water,
with heated water, preferably hot water, at the top of the water container 2. In a
specific aspect, the spray valve 6 is located on a diameter of the circular removable
side wall 3.
[0024] The water container 2 may further comprise a blind pipe 12 extending outside the
water container 2, preferably centrally located on the removable side wall 3, the
blind pipe 12 providing a lowest point of the water container 2 for draining purposes
and collecting any debris or cleaning residuals present in the water.
[0025] As seen on Figures 1 and 6, the water boiler 1 may also comprise a safety valve 13
disposed on an upper part of the water boiler 1, preferably on the upper side wall
5 of the water container 2, for releasing any excess pressure in the water container
2. The safety valve 13 may thus evacuate steam and expansion water that may be produced
when water is heated in the water container 2. The water container 2 may further comprise
a thermal sensor 14 for measuring the water temperature in the water container 2,
preferably at a lower level in the water container 2, preferably at a depth from the
upper side wall 5 of a quarter of the water container 2 height as better seen on Figure
5, for an accurate measurement of the water temperature that may be used to activate
water heating. The thermal sensor 14 may cause the heating element 9 to heat water
when the water temperature drops under a predetermined temperature threshold.
[0026] According to an implementation and as shown on Figure 1, the water container 2 comprises
an upper portion 2a, comprising a first section of the lateral side wall 4, and a
lower portion 2b, comprising a second section of the lateral side wall 4, the upper
and lower portions 2a, 2b being demountably linked together as will be described in
relation with Figure 6. The water container 2 according to this implementation of
the invention may thus be disassembled, by disassembling the removable side wall 3
from the water container 2 and/or the lower portion 2b from the upper portion 2a,
for providing easy and direct access to the volume V, for example for cleaning and
removal of lime scale deposition. Advantageously the water container 2 according to
this implementation of the invention may be enlarged by inserting at least one insert
portion of side walls (not shown) between the upper portion 2a and the lower portion
2b to allow for a larger volume of water to be stored in the enlarged water container
2.
[0027] In another implementation, the water container 2 may comprise the upper side wall
5 and the lateral side wall 4 integrally linked together, the upper portion 2a and
lower portions 2b being formed in a single integral piece. The water container 2 according
to this implementation of the invention may thus be disassembled by disassembling
the removable side wall 3 from the lateral side wall 4 of the water container 2 for
providing easy and direct access to the volume V, for example for cleaning and removal
of lime scale deposition.
[0028] Figure 2 shows an outside view of the water boiler 1 showing the upper and lower
portions 2a,2b of the water container 2 linked together and the removable side wall
3 linked to the second portion 2b.
[0029] Referring to Figure 3, there is shown the lateral side wall 4, having at the end
4a a first flange 15 extending from a bottom rim 16 of the lateral side wall 4, and
a corresponding second flange 17 arranged to be fixed to the first flange 15 so as
to attach the removable side wall 3 to the lateral side wall 4. Preferably the heating
element 9 extends beyond the inner surface 7 of the removable side wall 3 and may
be clamped by the first and second flanges 15, 17 to attach the removable side wall
3 to the lateral side wall 4. The first and second flanges 15, 17 may be held together
by means of a plurality of fixing means 18, and a sealing gasket 19 interposed between
the first and second flanges 15, 17 for a tight seal of the water container 2. The
sealing gasket 19 may be located in a peripheral recess 20 of the first flange 15
the sealing gasket 19 may be resting on the heating element 9 to provide a tight seal
of the water container 2.
[0030] Preferably, the heating element 9 may comprise a planar surface 10 extending on the
inner surface 7 up to the lateral side wall 4 and a peripheral portion 11 forming
a Z-shaped recess arranged to be interposed between the first and second flanges 15,
17 for a better sealing of the water container 2. More precisely the peripheral portion
11 has a first part of the Z arranged to rest on the inner surface 7, a middle part
of the Z providing an abutment surface for the lateral side wall 4 and a last part
of the Z being interposed between the first flange 15 and the second flange 17. This
arrangement of the heating element 9 in a Z shape, in addition to providing a locking
surface of the removable side wall 3 onto the lateral side wall 4, allows to isolate
the sealing gasket 19 from the water contained in the water container 2 thereby protecting
the sealing gasket 19.
[0031] On Figure 4 illustrates how the upper and lower portions 2a, 2b of the water container
2 may be linked together. In an implementation of the invention, the lateral side
wall 4 of the upper portion 2a has a third flange 21 at a bottom rim 22 and the lateral
side wall 4 of the lower portion 2b has a corresponding fourth flange 23 at an upper
rim 24, the third and fourth flanges 21, 23 being held together by means of a plurality
of fixing means 25, and a sealing gasket 26 interposed between the third and fourth
flanges 21,23. The sealing gasket 26 may be located in a peripheral recess 27 of the
third flange 23.
[0032] Figure 5 shows the output port 8 located on the upper side wall 5 and comprising
closing means 28 having a first position arranged to close the output port 8 (as better
seen shown on Figure 6) and a second position arranged to open the output port 8 and
release the heated water from the water container 2 (not shown). Preferably the pressure
and the introduction of water in the water container 2 may activate the closing means.
Operation of the water boiler 1 according to the invention may be achieved via displacement
of water in the water container 2. In operation, when the water container 2 is tightly
sealed, water introduced in the water container 2 by the valve 6 is heated by the
heating element 9, causing the pressure inside the water container 2 to rise and the
closing element 28 to move from the first position into the second position thereby
releasing water through the output port 8.
[0033] As illustrated in Figure 7, the water boiler 1 may advantageously be linked to an
under-counter water storage 100. The under-counter water storage 100 generally comprises
a faucet 101 for dispensing heated water from the water container 2 and arranged to
control water introduction in the water container 2. The faucet 101 may be located
at a sink 102 and linked to the water boiler 1 and to a water inlet pipe 103, leading
for example from a main water supply, preferably from a cold main water supply.
[0034] More precisely the faucet 101 is connected to the water boiler 1 at the valve 6 via
the inlet pipe 6a and at the output port 8 via the outlet pipe 8a for dispensing heated
water, preferably hot water, from the water container 2.
[0035] In operation, when the faucet 101 is opened, the heating element 9 is activated and
water is introduced in the water container 2 via the inlet pipe 6a through the valve
6 and directed on the heating element 9 where the water is heated. Advantageously
the valve 6 sprays water on the heating element 9 to accelerate the heating. Advantageously
the spraying of the water introduced in the water container 2 by the valve 6 reduces
mixing the water introduced in the water container 2, which is preferably cold, with
the already heated water contained in the water contained 2. The water is subsequently
heated causing the pressure in the water container 2 to rise. The introduction of
water in the water container 2 and the rising of the pressure activate the closing
means 4, thereby opening the output port 8 to dispense heated, preferably hot, water
at the faucet 101. Thus, a user of the water boiler 1 arranged in the under-counter
water storage 100 according to the invention obtains instantaneous heated or hot water
by simply opening the faucet 101.
[0036] For cleaning the water container 2 and in particular the heating element 9, the user
may disconnect the fixing means 18 to remove the removable side wall 3 from the lateral
side wall 4, effecting a corresponding removal of the heating element 9.
[0037] Advantageously the safety valve 13 of the container heater 1 is connected to the
sink 102 to evacuate in the sink 102 steam and water produced in the water container
2 when water is heated in the water container 2.In an aspect of the invention, the
faucet 101 linked to the water boiler 1 may be a secondary tap provided at a sink
or counter in addition to a conventional tap.
[0038] In another aspect of the invention, the faucet 101 linked to the water boiler 1 may
be a 3-way faucet providing both a control of conventional cold and warm water flows
and a control over the flow of water heated by the water boiler 1 at a sink or counter.
[0039] In both cases, the opening of the faucet linked to the water boiler 1 allows water,
preferably from a cold water mains, to be introduced into the water container 2, heated
and distributed via displacement of water as previously explained.
[0040] Changes to the water boiler can be made in light of the above detailed description.
In general, in the following claims, the terms used should not be construed to limit
the invention to the specific embodiments disclosed in the specification and the claims,
but should be construed to include all water boilers in accordance with the appended
claims.
1. A water boiler (1) comprising a heating element (9) and a water container (2) having
side walls defining a sealed volume (V) within which water may be received and heated
by the heating element (9), at least one of the side walls (3) being removable to
provide access to the volume (V), wherein the removable side wall (3) is configured
to receive and locate the heating element (9) such that removal of the removable side
wall (3) effects a corresponding removal of the heating element (9), characterized in that the heating element (9) is a planar heating element extending substantially perpendicular
to a major axis of the water container (2); and the water boiler further comprises
a spray valve (6) located on the planar heating element (9), the spray valve (6) configured
to spray incoming water on the planar heating element (9) to achieve a rapid heating
of water within the water container (2).
2. The water boiler of claim 1, wherein the removable side wall (3) defines a bottom
surface of the water container (2).
3. The water boiler of claim 1 or 2, wherein the planar heating element (9) extends substantially
parallel to a major axis of the removable side wall (3).
4. The water boiler of any one of the preceding claims, wherein the heating element (9)
extends up to at least one side wall (4) of the water container (2).
5. The water boiler of any one of the preceding claims, wherein the water container (2)
further comprises at least one insert portion of side walls arranged to be inserted
between the removable side wall (3) and a lateral side wall (4) of the water container
(2).
6. The water boiler of any one of the preceding claims, wherein the heating element (9)
has a surface treatment arranged to reduce lime scale deposits.
7. An under-counter water storage (100) comprising a water boiler (1) as claimed in any
one of the preceding claims.
8. The under-counter water storage of claim 7, further comprising a faucet (101) for
dispensing heated water from the water container (2) and arranged to control water
introduction in the water container (2).
1. Wasserboiler (1), umfassend ein Heizelement (9) und einen Wasserbehälter (2) mit Seitenwänden,
die ein abgedichtetes Volumen (V) definieren, in dem Wasser aufgenommen und durch
das Heizelement (9) erhitzt werden kann, wobei mindestens eine der Seitenwände (3)
entfernbar ist, um Zugriff zu dem Volumen (V) bereitzustellen, wobei die entfernbare
Seitenwand (3) dazu konfiguriert ist, das Heizelement (9) aufzunehmen und anzuordnen,
so dass eine Entfernung der entfernbaren Seitenwand (3) eine entsprechende Entfernung
des Heizelements (9) bewirkt, dadurch gekennzeichnet, dass das Heizelement (9) ein planares Heizelement ist, das sich im Wesentlichen senkrecht
zu einer Hauptachse des Wasserbehälters (2) erstreckt; und dadurch gekennzeichnet, dass der Wasserboiler weiterhin eine Sprühdüse (6) umfasst, das sich an dem planaren Heizelement
(9) befindet, wobei die Sprühdüse (6) dazu konfiguriert ist, eintretendes Wasser auf
das planare Heizelement (9) zu sprühen, um ein schnelles Erhitzen von Wasser in dem
Wasserbehälter (2) zu erzielen.
2. Wasserboiler nach Anspruch 1, wobei die entfernbare Seitenwand (3) eine untere Oberfläche
des Wasserbehälters (2) definiert.
3. Wasserboiler nach Anspruch 1 oder 2, wobei das planare Heizelement (9) sich im Wesentlichen
parallel zu einer Hauptachse der entfernbaren Seitenwand (3) erstreckt.
4. Wasserboiler nach einem der vorhergehenden Ansprüche, wobei das Heizelement (9) sich
bis zu mindestens einer Seitenwand (4) des Wasserbehälters (2) erstreckt.
5. Wasserboiler nach einem der vorhergehenden Ansprüche, wobei der Wasserbehälter (2)
weiterhin mindestens einen Einsatzabschnitt von Seitenwänden umfasst, der dazu eingerichtet
ist, zwischen der entfernbaren Seitenwand (3) und einer lateralen Seitenwand (4) des
Wasserbehälters (2) eingesetzt zu werden.
6. Wasserboiler nach einem der vorhergehenden Ansprüche, wobei das Heizelement (9) eine
Oberflächenbehandlung aufweist, die dazu eingerichtet ist, Kalkablagerungen zu verringern.
7. Unterbauwasserspeicher (100), der einen Wasserboiler (1) nach einem der vorhergehenden
Ansprüche umfasst.
8. Unterbauwasserspeicher nach Anspruch 7, weiterhin einen Wasserhahn (101) zum Abgeben
von erhitztem Wasser aus dem Wasserbehälter (2) umfassend, der dazu eingerichtet ist,
eine Wassereinführung in den Wasserbehälter (2) zu steuern.
1. Chauffe-eau (1) comprenant un élément chauffant (9) et un réservoir d'eau (2) ayant
des parois latérales définissant un volume étanche (V) à l'intérieur duquel de l'eau
peut être reçue et chauffée par l'élément chauffant (9), au moins une des parois latérales
(3) étant amovible pour fournir un accès au volume (V), la paroi latérale amovible
(3) étant configurée pour recevoir et placer l'élément chauffant (9) de telle sorte
que le retrait de la paroi latérale amovible (3) entraîne un retrait correspondant
de l'élément chauffant (9), caractérisé par le fait que l'élément chauffant (9) est un élément chauffant plan s'étendant de manière sensiblement
perpendiculaire à un axe principal du réservoir d'eau (2) ; et le chauffe-eau comprend
en outre une soupape de pulvérisation (6) située sur l'élément chauffant plan (9),
la soupape de pulvérisation (6) étant configurée pour pulvériser de l'eau arrivant
sur l'élément chauffant plan (9) afin d'obtenir un chauffage rapide de l'eau à l'intérieur
du réservoir d'eau (2).
2. Chauffe-eau selon la revendication 1, dans lequel la paroi latérale amovible (3) définit
une surface inférieure du réservoir d'eau (2).
3. Chauffe-eau selon la revendication 1 ou 2, dans lequel l'élément chauffant plan (9)
s'étend de manière sensiblement parallèle à un axe principal de la paroi latérale
amovible (3).
4. Chauffe-eau selon l'une quelconque des revendications précédentes, dans lequel l'élément
chauffant (9) s'étend jusqu'à au moins une paroi latérale (4) du réservoir d'eau (2).
5. Chauffe-eau selon l'une quelconque des revendications précédentes, dans lequel le
réservoir d'eau (2) comprend en outre au moins une partie d'insert de parois latérales
agencée pour être insérée entre la paroi latérale amovible (3) et une paroi latérale
de côté (4) du réservoir d'eau (2).
6. Chauffe-eau selon l'une quelconque des revendications précédentes, dans lequel l'élément
chauffant (9) a un traitement de surface apte à réduire les dépôts de calcaire.
7. Dispositif de stockage d'eau encastré (100) comprenant un chauffe-eau (1) selon l'une
quelconque des revendications précédentes.
8. Dispositif de stockage d'eau encastré selon la revendication 7, comprenant en outre
un robinet (101) pour distribuer de l'eau chauffée à partir du réservoir d'eau (2)
et agencé pour réguler l'introduction d'eau dans le réservoir d'eau (2).